Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 11 - Liquids and Intermolecular Forces - Exercises - Page 474: 11.26a

Answer

This difference is due to hydrogen bonding.

Work Step by Step

HF has hydrogen bonding while HCl does not. While HCl is polar and has dipole-dipole interactions, these are not nearly as strong as hydrogen bonds.
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